Срочно помогите!! все эти 3 номера!!

1 а =-0,37+(-0,43)=-0,8 б =-13,96-(-18,28)=4,22 в =3[latex] \frac{7}{16} [/latex]-[latex] \frac{5}{12} [/latex]+4[latex] \frac{9}{16} [/latex]=(3[latex] \frac{7}{16} [/latex]+4[latex] \frac{9}{16} [/latex])-[latex] \frac{5}{12} [/latex]=8-[latex] \frac{5}{12} [/latex]=7[latex] \frac{7}{12} [/latex] 2 =n-5.8-4.9-n=-10.7 3 -8.9-(3.7-x)=-13.6 -8.9-3.7+x=-13.6 x=-13.6+8.9+3.7 x=-13.6+12.6 x=-1